Embroidering or like machine



Oct. 22, 1935. JONAS 2,018,456-

I EMBROIDERING OR LIKE MACHINE Filed March 10, 1932 3 Sheets-Sheet 1 ATT RM. 5

Oct. 22, 1935. H. JONAS 2,018,456

EMBROIDERING OR LIKE MACHINE Filed March 10, 1932 3 Sheets-Sheet 2 Jr) van/or.

HM WW ATTQRIYEK.

Oct. 22, 1935. H. JONAS EMBROIDERING 0R LIKE MACHINE 3 Sheets-Sheet 3 Filed March 10, 1932 FIG.9.-

INVE N TOE v Hobs Jonas 87" J 49 MM!!! 1 M A TTOQ/VE YS FlG.8.

Patented Got. 22, 1935 UNHTED STATES PATENT OFFICE Application March 10, 1932, Serial No. 597,876 In Germany June 19, 1931 3 Claims.

This invention relates to an embroidering or sewing machine for making flat-stitch work in which an oscillatory needle in cooperation with a rotary shuttle is employed, said oscillatory needle being adapted to move laterally while retaining its vertical position, the extent of said lateral movement being adjustable while the device is operating where such machine is fitted with the crank operating means for changing the plane of needle oscillation and direction of feed transverse thereto, this adjustment of width must be also independent therefrom. According to a known arrangement, adopted also in carrying out the present invention, the lateral oscillatory movement of the needle and variation of its width or amplitude is derived from .a lever, the fulcrum of which is shiftable at will of the operator (i. e. by knee pressure) foraltering the amplitude of its motion imparted to it periodically during the operation of the machine, it being understood that when the deflection stands at zero, the needle continues to go up and down, but without any lateral movement. This needle bar is composed of two parts connected'together by means of a slot and pin coupling, and the lower needle carrier member of the bar is combined and in enagement with sliding guides and oblique slot members in such a manner that in the operation of the machine it has imparted thereto a lateral oscillation the extent of which may be adjustably controlled. The slot of the pin and slot coupling above referred to, is, according to a feature of the invention, arc-shaped, the curvature of this arc conforming approximately to a portion of the circular path of the tip of the shuttle. This feature renders it possible that the shuttle tip or hook can follow the oscillatory path of the needle. But, for constantly and automatically accommodating the position of the needle tip during the rotation of the shuttle so that the shuttle hook will always be in correct position with relation to the needle eye, in whatever position the needle is placed and irrespective of the extent of oscillation of the needle, it is necessary to alter the speed alternately by retarding or accelerating the speed. This is effected according to the inven tion by employing a differential gear, as hereinafter set forth.

In the accompanying drawings,-

Figure 1 is a front elevation with parts broken away and in section, showing a crank embroidering machine constructed according to the present invention, and showing only so much of the sewing mechanism as is essential to the disclosure of the invention.

Figure 2 is a side view of the shuttle driving gear of Figure 1.

Figure 3 is a front view of the needle and shuttle in a different position as compared with Figure 1. n

Fig. 4 shows a modified construction of a differential gear applicable instead of the difierential gear shown in Figure 1.

Figures 5 and 6 are a modified form of the shuttle driving gear with the differential gear dis- 10 posed within the carrier of the shuttle.

Figure '7 is a diagrammatical view of parts shown in Figures 5 and 6.

Fig. 8 shows in detail a rear view of the twopart needle bar with guide pin and arcuate slot 1 connection.

Fig. 9 is a view detached from Fig. 1 showing in a greater scale the needlecarrier block with the oscillatory needle-bar member, which is a separate part of the needle bar and connected g therewith by pin and slot connection.

Fig. 10 is a rear view of Fig. 9.

Fig. 11 is a side view of Fig. 9 as shown from the right side thereof.

Fig. 12 is a longitudinal section, showing the g5 disposition of the movable parts not seen in Fig. 11, and

Fig. 13 is an elevation, viewed from the left of Fig, 1, of a certain adjusting rod and associated parts. 3

Referring to the drawings, (Figs. 1-3) A is the arm within which the main shaft A and the other accessories of an ordinary crank embroidering machine are enclosed; and in the drawing (Fig.

1) most of these parts are omitted as unneces- 35 sary to a disclosure of the invention. In the head of the arm A is arranged the needle operating mechanism; the part a is the end of one arm of a two-armed lever 16 fitted in a. sleeve IS, the other arm m of which lever forms a tail piece, 40 to which a swinging motion is imparted that is controllable by the operator in respect to its amplitude. The cam c rotated by motion derived from the main shaft, is arranged so as to reciprocate up and down a link m, which is articulated to the tail piece m; the pivoting point of the two-armed lever, composed of the parts a and m is not a stationary one, but comprises a pin 16a located on .an adjustable slide 15 connected with a pivoted rack extension l9 and engaging a. slot I62) in the rear of lever l6. Thus, shifting of the pivot pin l6 either to the right or to the left has the effect that the leverage is altered in the sense of increasing or diminishing the extent to which the arm a is raised or lowered. It may this plate, being slidable invertical direction on be further observed, that in the construction shown in Fig. l the shiftable member or slide [5 bearing the pivot pin for the lever l6 is'suspended and guided by .a support 20 which has an upper suspending arm 20' provided with a pin or pivot engageable selectively in any one of the differently disposed holes 2|, 22, 23 in the machine arm, thus rendering the device adjustable for shifting the median line of the range of oscillation more or less laterally. By this adjustment the operator is enabled to so position the oscillating needle, that the oscillation may be shifted eccentrically to either side of a neutral position. Fig. 1 shows the position as shiftedqto the right side; normally the point of the upper arm 20 would rest in the middle or zero position at'22.

. The arm a is provided with a depending bracket embracing a collar 8, which supports a carrier bar N, extending downward parallel to the needle-bar N, which as shown in Fig. 8, is composed of two parts, an upper part n and a lower part 11. forming the carrier of the needle.

. The needle-bar n is formed in its upper part tubularly, as clearly shown in Figs. 9-12 and passes within the needle-bar tube 10, which is rotatably arranged, its turning movement being derived in known manner, simultaneously with the corresponding turning movement of the shuttle device, from the usual crank operating gear, the crank of which is indicated at h in Fig.

'1. This tube 10 is not, however, capable of vertical movement andis integral with a carrier casing or block ll embracing as movable parts a transversely guidedcross-head 12 for which sliding ways are provided in an intermediate wall 13 of the block I I and are engaged by the guide-pins 14; whilst thelatter are both secured to the said cross-head, 'IZslidably located at the front side of the wall 13 (Figs. 9 and 12), they are also rigidly connected at the opposite side with a shifting block 15 (Figs. 10 and 12), which forms the vertical guide-way for the; lower needle bar member 12. (Fig, 1'). As clearly seen in Fig. 10, this member, though maintaining its vertical position regardless of the transverse displacement of 'the cross head lzgwith adjacent shifting block- 15, is connected with the upper part n of the needle-bar; by a; stud i engaging with an arcshaped slot 9', so that it is moved up and down by the reciprocatory movement of this bar n. The

thread is fedthroughthe; tubular part of the bar n rarrivingfrorn above in known manner, and is then; conducted through a hole- 16 (Fig. 10).

From this hole the thread-is-leading to the needle eye, irrespective of the positioning of the needle rounding the needle-bartube I0 and; operatively' connected with a slide b, also indicated in Fig. l

and shown partly in Fig. 9 as forming a fork b" engaging with a groove of sleeve Fl. Another annular groove of this sleeve is engaged by a yoke IS-connected with the plate In (Figs. 1 and'9) and the block or casing 11 is provided with an inclined slot s. The diagonal key t protruding'from the cross-head 12 is workingrini said slots, so that the rocking of the plate It causes the cross-head '12 to move together with the block and needlethe sleeve 11,.which;in turn is dependent on and;

controlled by the reciprocatory up and down movement of an index arm a (Fig. 1) connected with the nose of the periodically swinging lever, shown in the upper part of Fig. l and provided with a forked end engaging with a stud a. of the 6 slide b.

It is to be understood that the arc-shaped slot s has the same or nearly the same curvature as the circular path of the nib of the rotary shuttle, em-

ployed for cooperating with the oscillatory nee- 10 die.

The needle tube enclosing the above described parts, is turnable in known manner around a vertical axle; the turning movement is effected by the hand crank h (as indicated by dotted lines 15 in Fig. 1) arranged at the bottom of the machine. The gear serving to transmit the rotation is only partly shown in the lower part and is combined with the means for driving the rotary shuttle; the plane of its rotation is set vertically and in m alignment of, the needle tube axis.

The transmitting gear comprises according to Fig. 1 the bevel gears l, 2, the-shafts 3 and 4 and the bevel wheels 5 and 6. Through a bevel wheel gear 'l, 8, 9, the cage-like shuttle carrier l0 oonl5 nected with bevel wheel 9 is. imparted its rota:- tion which agrees with the needle bar accessory rotation imparted to it from'above.

A rotating shuttle g is used and the drive imparted to it immediately from below by means so of a pair of bevel wheels I I, I2 from a divided line of shafting u, v, w, which, by means of shaft w. is, imparted drive from the main shaft A situated above taking it up through bevel wheels I3, l4 1 at shaft 12 and conducting it through diiferential ll gear d to the other side of shaft u. This ar-- rangement and the connection with the circulating gear e, e e, e in relationto the gear'actuated by hand crank it is known. Novel is, be-

sides the arrangement described of the needle 0 V bar with curved slot guide, the employment of a second differential gear p, q with circulating member 1' before shaft 11. when the motion of said circulating member actuated by adjusting rod r is. brought into constrained dependence of the motion enforced upon the variably oscillatable needle carrier 11..

As a member which takes part in this motion with changeable rangeof deflection Fig. 1 shows a lever arm 2. The arbitrary adjustment of the 5 angle of oscillation may be carried out by any setting device. In the example given by Fig. 1, this setting device coacts with lever m and guide member l6, and consists of a tooth segment ['8 turnable by knee abutment lever :c by means of toothed gear shaft I1, rack segment l8 to the right or left, whereby through. member IS the lever fulcrum is adjusted for greater or smaller amplitude of oscillation.

Bymeans of gear rods or other transmission ar- 3 rangement lever arm 2 transmits the motion of the adjusting lever 1' provided at the differential gear 17, q, r in such way that, in accordance with every change of extent of oscillation of the needle-rotating'action, a certain delay or acceleration is caused just suflicient to bring the catcher point a (Fig. 3) always into proper position to the needle. 7

The transmission rods represented in Fig. 1

consist of angle levers 3|, 32 which are connected with rods33, '34 and transfer the adjusting motion to crank; arm 35, of shaft 36 from which a crank arm,- 31 of-the other end engagesthe adjusting rod=r ofdiiferentialgear p, q, 1'.

Thus, while the turning motion comingyfromq differential gear d constantly drives the shuttle, the position of its tip through adjustment of the planet gear 1' at the intermediate differential gear p, q, 'r, is so influenced by accelerating or retarding the speed that it is always properly timed to the corresponding lateral oscillation of the needle.

According to Figs. 1 and 2 the drive of the shuttle is transmitted by wheel gearing M, 42, 43, 44 enabling a conversion to any higher speed.

In Fig. 4 another type of diiferential gear is shown which can be used in connection with the arrangement of Figs. 1-3, and which is therefore drawn below Fig. 2 so that the drive derivation to shaft 0 (Figs. 1 and 2) of the catcher gear is rendered possible. Shaft 12 connected with the differential gear d (Fig. 1) opposite shaft 1) carries a bevel wheel 6| which engages with a bevel wheel 62. Within the hub of the latter, provided with corresponding thread, there is the adjustable and turntable steep thread screw 60 the stroke position of which is alterable, through lever 3'! similar to lever 38 in Fig. 5, by means of engagement with an annular groove at the screw shaft, the alteration being according to the extent of oscillation of the needle at the time being. The screw shaft continues at the top in a tube 63 for reception of a shaft 0. This is provided with pivot 54 sliding in a slot of tube 63 whereby the rotation is transmitted to the shaft irrespective of the stroke alteration. The shaft may be arranged as in direct connection with shaft 0 (Figs. 2 and 1) and then, by means of the di'nerentially acting screw gear (SI, 62, 60) takes up the driving rotation transmitted with speed increase or decrease in the same way as in connection with the differential gear p, q, r in Fig. 1.

Figs. 5, 6 and '7 show a modified construction for carrying out the invention. In this case an adjusting arm 38 is made a direct means in order to bring about the adjustment regarding the position of the tip of the shuttle relatively to the reciprocating needle. The shuttle casing is turnable by a vertical shaft 39 and carries, by means of a side bracket 40, the wheel gear 45, 46, 41, wheel 4'! of which effects the drive for the rotating shuttle g Wheel 41 and the shuttle are both supported on a tiltable part 40 of bracket 40. A tilted position is shown in Fig. 7 indicating the link parts 48, 49, 50 by which the motion is transmitted. Guide arm 48 is secured to a collar or socket 48 which is supported on the upper end of shaft 39. The latter is lifted or lowered by the lever 38 being operated in unison with the index lever z.

The shaft or spindle 39, provided with collar 39 extends axially through the wheels I2 and 9 and when moved, transmits an adjusting motion to the tilting part position 40. The rotation drive is transmitted by wheel 9 and independently on wheel train 45, 46, 41 mounted on supporting bracket 48 by pairs of bevel wheels H I2 or 5!, 52. As the guide arm 50 is fixed at tilting support 25 every raising and lowering motion of shaft 39 causes a tilting of this part and thus of the shuttle g In consequence of the adjusting movement transmitted from the index lever 2 (Fig. 1) the tip of the shuttle forwards and backwards in accordance with the extent of oscillation of the needle so as to be always in correct position to the needle.

Since the wheel arrangement with the tilting part representing an epicycloidal element brings about a rolling rotation of toothed wheel 41 on wheel 46, a relative differential motion is obtained at the. same time during the transmitting operation described, so that a very quick drive of the shuttle may be obtained and the shuttle made of relatively small size. There is also a reduced stroke of the, adjusting lever 38 required. Consequently the shuttle can be driven with high speed.

It is obvious that features of the invention described may be applied to crank adjusted embroidering machines and flat stitch and hemstitch machines, as well as simplified machines without crank adjustment. 1

What I claim as my invention and desire to secure by United States Letters Patent is:-

1. In an embroidering or sewing-machine of the type specified for making fiat-stitch work, having a rotary shuttle, a two-part needle bar having a needle carrying part capable of an oscillatory lateral movement transverse to the feed of the Work, means for reciprocating the needle bar vertically and means for simultaneously imparting to the needle carrier part an oscillatory 2 movement, a device whereby the operator is independently enabled to vary the said amplitude of the oscillatory movement of the needle and which device comprises an index member participating in the said movement proportioned to the oscil- 2 lation amplitude, a transmitting gear deriving from the machine main shaft the normal drive motion for the rotary shuttle, the said transmitting gear comprising a diiferential gear, the adjusting member of which is operatively connected 3 with the above-mentioned index member so as to move automatically in unison therewith, thus imparting to the speed of the rotary shuttle a correspondingly retarding or accelerating effect with the result that the tip of the rotating shuttle is presented always in correct position to the needle eye.

2. In an embroidering or sewing-machine of the type specified for making flat-stitch work, having a rotary shuttle, a two-part needle bar 4 having a needle carrying part capable of an oscillatory lateral movement transverse to the feed of the work, means for reciprocating the needle bar vertically and means for simultaneously imparting to the needle carrier part an oscillatory movement, a device whereby the operator is independently enabled to vary-the said amplitude of the oscillatory movement of the needle and which device comprises an index member participating in the said movement proportioned to the oscillation amplitude, at transmitting gear deriving from the machine main shaft the normal drive motion for the rotary shuttle, the said transmitting gear driving with uniform speed,

and a pair of bevel gears, one having a screw threaded hub receiving a screw shaft forming the intermediate adjustable member of a differential gear interposed between the bevel gear and the arbor of the shuttle drive mechanism, the said screw-shaft being adapted to be elevated or lowered relatively to the hub threading, and having a shifting member operatively connected with the index member so as to move automatically in unison therewith, thus imparting to the speed of the rotary shuttle a correspondingly retarding (1 or accelerating efiect with the result that the tip of the rotating shuttle is presented always in correct relation to the position of the needle eye.

3. In an embroidering or sewing-machine of the type specified for making fiat-stitch work, having a rotary shuttle, a two-part needle bar having a needle carrying part capable of an oscillatory lateral movement transverse to the feed of the work, means for reciprocating the needle bar vertically and means for simultaneously impendently enabled to vary the said amplitude of the oscillatory movement of the needle and which device comprises an index member participating' in the said movement proportioned to the oscillation amplitude, the said transmitting gear imparting a uniform speed to a tubular arbor centrally located within the yoke carrying the shuttle driving 'mechanism, which comprises a tilting top part carrying the shuttle and its companion pinion inepicycloidal position to a sun wheel so as to receive from the latter the normal drive transmitted bythe said central arbor,-the

pinion and sun wheel forming a differential gear and acting as such when the top part is tilted about the axis of the sun wheel, and means for imparting the requisitetilting movement to the top operatively connected with the index member so as to move automatically in unison therewith, thus imparting to the speed of the rotary shuttle a correspondingly retarding or accelerating effect with the result that the tip of the rotating shuttle is presented always in correct relation to the position of the needle eye. 7

' HANS JONAS. 

